From Socketsite.com:
A “plugged-in” reader goes to the head of the site for his/her must read comment and insight into building a home in San Francisco. The punch line: “This is possibly one of the hardest places to build on the planet, and another reason property is expensive here. If the stars align, you might make some money. There’s also lots of chances to loose your shirt.” Our reader’s back of the envelope calculations and commentary (with slight editing for format):